Means for grinding and polishing rolling-mill rolls.



A. P'. COATE.

MEANS FOR GRINDING AND POLISHING ROLLING MILL ROLLS.

APPLICATION FILED MAY 4. ms.

1 ,21 2, 1 3 1 v Patented Jan. 9, 191 7.

3 SHEETS-SHEET l.

.A. P. COATE. MEANS FOR GRINDINGAND POUSHING ROLLING MILL ROLLS.

APPLICATION FILED MAY 4. 96. 1,212,131. Patented Jan. 9,1917.

3 SHEETS-SREET 2- Fig.

M 55 I I v 4 x w' A. P. COATE. MEANS FOB GRINDING AND POLISHING ROLLING MILL ROLLS. 1,212,131.

APPLICATION FILED MAY 4, I916.

ALBERT I. COATE, MIDDLETOWN, OHIO.

MEANS FOR GRINDING AND POLISHING ROLLING-MILL ROLLS.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed May 4, 1916. Serial No. 95,294.

To all whom it may concern:

Be it known that I, ALBERT P. CoATn, a citizen of the United States, residing at Middletown, in the county of Butler and State of Ohio, have invented certain new and useful Improvements in Means for Grinding and Polishing Rolling-Mill Rolls; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in means for grinding and polishing the rolls such as are used in rolling mills. 4

As is well known, the rolls employed in rolling mills must be maintained at a high temperature in order to insure the, working of the rolls to the greatest rolling width. Also, such rolls are subjected to severe usage which results in roughening the surface of the rolls and causes pitting. This necessitates a cessation of operations in order to regrind or repolishthe faces of the rolls. Also, the rollshave a tendency to wear hollow in the rolling, or working surfaces and to thereby produce bearings at the ends of the rolls which result in the sheets having thin and defaced edges. In other words, the sheets are of irregular thickness, being th nner near the edges. The object of this 1n- Vention, is, therefore, to provide means for grinding and polishing the rolls of sheet rolling mills and formaintaining the rolling faces or surfaces thereof parallel wlthout having to shut down the mill with the consequent loss of time and the useless dissipation of heat of the rolls, and thus enabling the rolls to be utilized at all times to their greatest rolling width or capacity. And also insuring the production of sheets of uniform thickness.

For a more particular description of my invention, reference is made to the accompanying drawings.

Referring to said accompanying drawlngs in general terms, Figure 1 is a front elevation of a single stand of a rolling mill p r0- vided with my invention; Fig. 2 1s a section on the line 22 of Fig. 1'; Fig. 3 is a top plan view of the polishing means for the upper roll, the same being a section onthe line 33 of Fig. 2; Fig. 4 is a top plan view of the polishing-means for the lower roll, the same being a section on the line 4-4 of Fig. 2; Fig. 5 is a detail view of the supporting means for the abrasive blocks, the same being a partial section on the line 55 of Fig. 6; Fig. 6 is a partial section on the line 66 of Fig. 5; Fig. 7 is a detail view of the means for reciprocating the grinding members; Fig. 8 is a detail view of the means for guiding the lower grinding means; and Fig. 9, sheet 2, is a detail view of the reciprocating means for the lower abrasive member.

In the specification and drawings, similar reference characters indicate corresponding parts both in the description and drawings.

Referring more particularly to the accompanying drawings, 1 represents a foundation upon which are mounted the housings 2. J ournaled in the housings 2 in suitable bearings 3 is a lower roll 4 and an upper roll 5 provided with suitable journals 6. The distance between the rolls 4 and 5 is regulated by screws 7 in a well known manner. As is commonly known, the metal in a heated condition is passed between the rolls to flatten the same into sheets. To maintain the surfaces of the rolls in a proper condition for this work and to thereby insure a substantially uniform thickness of sheets, the following roll grinding means are provided and constitute my invention.

Mounted on brackets 8 extending from the housings 2 are bearings 9 in which are journaled the fulcrum portions 10 oflevers 11. The inner ends of the levers 11 support trunnions 12 extending from the ends of supporting bars 13. There is a bar 13 for shaped projections 15; see Fig. 5. The said projections 15 extend from holding members 16 which are provided with lips 17, Fig. 6, upon which grinding blocks 18 are mounted. The blocks 18 are of any' suitable abrasive material such, for example, as emery or carborundum, and are backed by suitable pads 19 of any suitable material, such as asbestos or felt, which lies between the grinding blocks 18 and their holding members 16. The blocks 18 are held on said holding members 16 by the lips 17 and by removable plates 20 which grip them in a manner similar to the lips 17. The lips 17 and the plates 20 enter suitable grooves 21 in said blocks, as shown in Fig. 6. The plates 20 are held in position on the holding members 16 by any suitable well known means or by the means which may consist of levers 22 having interference with the other members or the holding member therefor. The wedgeshaped blocks 15 and the openings 14 permit the holding members 16 and theblocks 18 to have a rocking movement relative to the bar 13. This relative movement may be regulated or adjusted by set screws 24 mounted in the bar 13. The screws 24 are I adapted to adjust, individually,'the blocks relative to the rolls. The blocks 18 are drawn toward the bar13 by springs 25 ..whi,ch are mounted in pockets 26 in said bar 13.

The bars 13 may be provided with any 7 number of grinding and polishing'blocks 18.

depending upon the length of the roll, it being understood that the said blocks 18 are of such a length that they may adjust themselves to any uneven surfaces of the rolls.

s5 3 27, as seen in Fig. 3. One end of each of 'The outer ends of the levers 11 before referred to are provided with cross members said cross members carries weights 28 which are instrumental in pressing the grinding blocks 18 against the upper roll 5. The pressure of the upper blocks 18 against the upper roll is further regulated by springs 29 which are attached to the other end of each of saidcross members 27. The tension ofthe springs 29 may be adjusted by turnbuckles 30 which are connected to arms or brackets 31 extending fromthe housings 2,

'Fig. 2. The trunnions 12 of the lower bar 13 are mounted on arms 32 pivoted at 33 to the housings 2, Fig. 8. The arms 32 maintain the lower bar 13 in proper alinement withthe lower roll. The said 'arms32 are prevented from dropping downwardly,

when the abrasive blocks 18 of the lower roll are in contact with said roll, by stop pins 34. The said bar 13 is provided at its middle with a bracket 35 which'is pivotally connected at 36 to an arm 37 of arod 38, see

a Fig. 2. The rod 38 is slidably pivoted at its ends in brackets 39 fixed'to the housings 2. The arm 37 of said rod-is provided with. an

eye lug 40 which receives the hooked end of a weight 41. The weight 41 is instrumental in pressing the grinding blocks 18 of the lower roll 4 against the face of said roll, When the said blocks 18 are in contact with the faces of the rolls and the rolls are revolved, the faces of said rolls will be ground in proportion to the unevenness thereof, and to prevent streaks forming in the rolls and to otherwise insure an even and smooth surface, the bars 13 and the blocks carried thereby are reciprocated by the following means: Mounted on the inside of the right side housing 2 as seen from Fig. 1, is a plate 42, see particularly Figs. 3 and 7 which is provided with bearings 43 in which is j ournaled a shaft 44. One end of the shaft 44 is provided with a. sprocket wheel 45 connected by means of a chain 46 to a sprocket 47 attached tothe upper roll by any suitable means. In the present instance, the sprocket 47 is secured to the wabble 48 by a clip- 49 to which the sprocket is secured. The shaft 44 is, therefore,-rotated from the upper roll. Mounted on the end of the shaft 44 opposite the sprocket 45 is a bevel pinion 50 in mesh with a bevel gear 51 pivoted at 52 to the plate 42. The gear 51 is provided with a crank pin 53 to which is pivotally attached a connecting rod 54 which is also attached at 55 to alever 56 pivoted at 57 to the plate 42. By this means thelever 56 is oscillated upon itspivot. The upper end of the lever '56 is provided with a projection 58 which enters a recess or notch 59 in the right trunnion 12 of the upper bar 13. The lower end of the lever 56 is pivotally attached at 60 to a connecting rod 61 the opposite end of which is pivotally connected to an arm 62 depending from the arm 37 of the rod 38, see FigS. 2 and 9. When the lever 56 is oscillated by the gear 51, the upper and lower bars 13. will be alternately reciprocated longitudinally over the face of the rolls, thereby insuring the imparting of an even surface to the rolls.

Having described my invention, I claim.

1. In means for grinding and polishing rolls, the combination of a bar having a series of openings therein, a series of holders having portions entering the openings in said bar and supported therein, abrasive members adjustably mounted in said holders and adapted to engage a. roll, means adapted to press said abrasive members against said roll, and springs adapted to maintain said holders in contact with said means.

2. In means for grinding and polishing rolls, a bar, abrasive members adjustably mounted on said bar and adapted to engage a roll, means actuated by the roll so engaged and adapted to reciprocate said bar, and means adapted to press the abrasive members against said roll while the bar is being 'reciprocated.

3. In means-for grindmg and polishing rolls, a bar, holding members adjustably mounted on said bar, abrasive members mounted on said holding members carried by said bar for adjusting said abrasive members relative to the roll acted upon thereby,

and means acting on said bar to press said abrasive members against the roll.

4. In means for grinding and polishing rolls, a bar having rectangular openings therein mounted across the face of a roll, wedge-shaped members extending into said rectangular openings, holding members mounted on said wedge-shaped members, screws adapted to adjust the position of said holding members relative to said bar, abrasive members mounted in said holding members, and means adapted to press said abrasive members against said roll.

5. In means for grinding and polishing rolls, abrasive members mounted in engagement with rolls, means adapted to press said abrasive -members against said rolls, and means actuated by one of said rolls and 1t:Zdapted to reciprocate said abrasive memers.

6. In means for grinding and polishing rolls, abrasive members mounted in engagement with rolls, weights adapted to press ment with rolls, levers upon which said abrasive members are mounted, weights adapted to press said abrasive members against said rolls, a lever connected to said abrasive members and'adapted to reciprocate the same, a crank connected to said lever, and gear, shaft and chain connections between said crank and one of said rolls.

In testimony whereof I afiix my signature, in presence of two Witnesses.

ALBERT P. COATE.

Witnesses:

RUSSELL C. Goonmcn, MATTHEW SIEBLER. 

